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<head><meta charset="utf-8"><title>Was any generic parameter ever added to a stable struct? · t-libs · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/index.html">t-libs</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/topic/Was.20any.20generic.20parameter.20ever.20added.20to.20a.20stable.20struct.3F.html">Was any generic parameter ever added to a stable struct?</a></h3>

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<a name="211269199"></a>
<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/219381-t-libs/topic/Was%20any%20generic%20parameter%20ever%20added%20to%20a%20stable%20struct%3F/near/211269199" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Tim Diekmann <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/topic/Was.20any.20generic.20parameter.20ever.20added.20to.20a.20stable.20struct.3F.html#211269199">(Sep 25 2020 at 15:01)</a>:</h4>
<p>Was any generic parameter ever added to a struct after it has been stabilized? Are there any experiments/expecrience beside <a href="https://github.com/rust-lang/rust/issues/71873">#71873</a>?</p>



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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/219381-t-libs/topic/Was%20any%20generic%20parameter%20ever%20added%20to%20a%20stable%20struct%3F/near/211280155" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> Steven Fackler <a href="https://rust-lang.github.io/zulip_archive/stream/219381-t-libs/topic/Was.20any.20generic.20parameter.20ever.20added.20to.20a.20stable.20struct.3F.html#211280155">(Sep 25 2020 at 16:22)</a>:</h4>
<p>The hasher parameter was added to HashMap and HashSet iirc</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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